Steam-boiler



-(No Model.) 2 Sheets.-Sheet 1.

G.-ST ARKE.

, STEAM BOILER. No. 552,648. Patented Jan. 7, 1896.

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2 SheetsShe et 2. G. STARKE. STEAM BOILER.

(No Model.)

Patented Jan. '7, 1896.

NITED STATES ATENT. Fries.

CONRAD STARKE, OF MILlV-AUKEE, VISCONSIN.

STEAM- BOILER.

SPECIFICATION forming part of Letters Patent No. 552,648, dated January- '7, 1898.

Application filed November 26, 1894. Serial No. 529,978. (No model.)

To all whom it may concern:

Be it known that I, CONRAD STARKE, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of \Visconsimhave invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object to insure the heating and circulation of what is usually dead water in the generally-termed Scotch type of marine boiler, the result being more rapid production of steam and equal expansion of the boiler.

Therefore said invention consists in the certain peculiarities of construction and arrangement of parts hereinafter more particularly described with reference to the accompanying drawings, and subsequently claimed.

I11 the drawings, Figure 1 represents a transverse section of a boiler embodying my improvements, the section being partly taken on line 1 1 of the succeeding figure and broken back. Fig. 2 represents a vertical longitudinal section of the boiler, the section being taken on line 2 2 of the preceding figure.

Referring by letter to the drawings, A represents a boiler; B, furnaces, and C a combustion-chamber within the boiler; D, horizontal fines for products of combustion; E, truss-braces for the top and bottom of the combustion-chamber; F, brace-rods connecting the ends of said boiler, and G stay-bolts intermediate of said chamber and adjacent end of the aforesaid boiler. I

The construction thus far described is embodied in the well -known Scotch type of marine boiler, except as to a matter of detail in the construction of the furnaces and combustion-chamber. Ordinarily in boilers of the type above named the combustionchamher is a circular shell, but in carrying out my invention it is necessary that the top and bottom of said chamber be 011 horizontal planes, as herein shown, and this being the case the otherwise cylindrical furnaces have beveled lower rear portions that are joined to the flat bottom of said combustion-chamber. In the combustion-chamber is a series of vertical tubesI that extend through the top and bottom of the same, the number and arrangement of these tubes being such as may be found most convenient or desirable.

In practice I tap the necessary openings in the bottom of the combustion-chamber and have the lower ends of the tubes screwthreaded to engage said openings. I also prefer to make the necessary openings in the top of the combustion-chamber of greater diameter than those in the bottom, the space intermediate 'of each of the top openings and a tube being filled with a suitable bushing J, the latter being clearly shown in Fig. 2. By this construction and arrangement .of parts it is evident that I facilitate the placing or removal of the tubes.

Ordinarily the water below the furnaces in a boiler of the type to which my invention per tains is stagnant, and consequently there is unequal expansion of said boiler,but it follows that by placing vertical tubes in the combustion-chamber the water in these tubes will be rapidly heated and by its rise create a suction that will cause circulation of the otherwise stagnant and cooler .water. It also follows that by the same units of heat ordinarily employed there is a more rapid production of steam, because of the increased heating-surface and circulation of water in the boiler, and all the water being necessarily of uniform temperature the expansion of said boiler is equal throughout.

In order to insure the products of combustion coming into contact with all the tubes I before escaping from the chamber 0 through the flues D, I employ a horizontal deflector K that extends rearward from the front wall of said chamber below said flues, and it is pref-- erable to rest the deflector on tubular supports L capped or plugged at their rear ends, their front ends being open tothe water in the boiler, whereby I prevent burning out of said supports.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a marine-boiler of the so called Scotch type, a combustion-chamber fiat at the top and bottom but otherwise circular, a series of vertical tubes in said chamber extending through the top and bottom of the same, and a deflector extending rearward from the front Wall of the aforesaid chamber below horizontal fiues through which products of combustion find their escape.

2. In a marine-boiler of the so called Scotch type, a combustion-chamber flat at the top and bottom but otherwise circular, a series of vertical tubes in screw-thread engagement with the chamber-bottom, and a corresponding series of bushings set in the chamber-top to surround the upper ends of the tubes.

3. In a marine-boiler. of the so called Scotch type, a combustion-chamber flat at the top and bottom but otherwise circular, a series of vertical tubes in said chamber extending through the top and bottom of the same, tubular supports that extend back from the front Wall of the aforesaid chamber but have closed rear ends, and a deflector on the supports below the horizontal flues through which products of combustion find their escape.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of Visconsin, in the presence of two Witnesses.

CONRAD STARKE.

Vitnesses:

H. G. UNDERwoon, \VM. H. MEYER. 

